Test of live video. For some reason the camera feed goes black but audio continues. The feedback is due to close proximity to dad's phone

I’m trying to upload videos I recorded on my iPhone but it keeps saying error. Any helpful tips for what I’m doing wrong?

If I'm logged in to my account on my PC, is there a restriction that prevents me from logging in through my PHONE browser (brave) to log in? I got a message on my phone, that my account is 'locked" preventing me from signing in through my phone browser. I seem to be able to do this with other sites that I do not have an app to access. So would like some insight regarding this. Its true, I keep a window with my account open on my PC, so I just click the tab and there is my Heroes page. But I'm not always at home or available at my computer... thought I could also access it via my phone. I'm sure once and app is available, this will be resolved. thank you.